On rough equalities. (English) Zbl 0569.68084
Rough equalities appear in a natural way if studying information systems. In the article reviewed above, the so-called rough top equalities and rough bottom equalities are completely characterized. Complete characterizations of rough equalities are given in the present article.
MSC:
| 68P20 | Information storage and retrieval of data |
| 03E20 | Other classical set theory (including functions, relations, and set algebra) |
| 06B10 | Lattice ideals, congruence relations |
